CVE-2021-30274
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedPossible integer overflow in access control initialization interface due to lack and size and address validation in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wired Infrastructure and Networking
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceInteger overflow vulnerability in access control initialization interface of Qualcomm Snapdragon chipsets due to missing size and address validation. This low-level firmware flaw could allow memory corruption leading to privilege escalation or bypass of security controls.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsall versionsall versionsall versionsall versionsall versionsall versionsall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the Qualcomm chipset model in your deviceCheck the device hardware documentation, BOM (bill of materials), or system information to determine which Qualcomm chipset is present. This may require reviewing schematics, device specifications, or using hardware identification tools.Affected if The chipset model matches Ar8031, Ar8035, Csr8811, Csra6620, Csra6640, Csrb31024, Fsm10055, or Fsm10056
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Verify firmware version of the affected chipsetAccess the chipset firmware version through vendor-provided tools, debug interfaces (JTAG/UART), or firmware dump analysis. Consult the device or chipset vendor documentation for version retrieval methods specific to your hardware.Affected if The firmware version corresponds to any released version of the listed chipsets (the vulnerability affects all versions)
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Confirm access control initialization is in useReview the chipset configuration and firmware features to determine if the access control initialization interface is enabled. This interface handles memory access permissions during boot. Check firmware documentation or configuration files for access control module status.Affected if The access control initialization interface is present and active in the firmware configuration
Your environment is affected if your device incorporates any of the listed Qualcomm chipset firmware (Ar8031, Ar8035, Csr8811, Csra6620, Csra6640, Csrb31024, Fsm10055, Fsm10056) with the access control initialization feature enabled, as all versions of these firmwares contain the integer overflow vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor-supplied firmware patches from Qualcomm and device OEMs; no user-level workarounds available for this hardware/firmware-level vulnerability.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $15,616.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-30274 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-30274 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data